Halara to Onzie leggings size

The short answer

Halara XXS is Onzie X/S by the two brands' own charts. 5 of 6 Halara sizes land on a different label at Onzie.

Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.

Every Halara UltraSculpt size read across to Onzie. Letter sizes on the left, Letter on the right.
Halara UltraSculpt	Halara builds it for	Onzie, by chart	Same label	Onzie builds it for	Onzie also prints
XXS	waist 24 to 25 in, hip 33.5 to 34.5 in	X/S	not published	waist 24 to 26 in, hip 33 to 35 in	US numeric 0-2
XS	waist 25.5 to 26.5 in, hip 35 to 36 in	X/S	not published	waist 24 to 26 in, hip 33 to 35 in	US numeric 0-2
S	waist 27 to 28 in, hip 36.5 to 37.5 in	S/M	X/S	waist 26 to 28 in, hip 36 to 38 in	US numeric 2-6
M	waist 28.5 to 30.5 in, hip 38 to 40 in	M/L	S/M	waist 28 to 31 in, hip 38 to 40 in	US numeric 6-8
L	waist 31 to 33.5 in, hip 40.5 to 43 in	L/L	M/L	waist 31 to 33 in, hip 40 to 42 in	US numeric 10-12
XL	waist 34 to 36.5 in, hip 43.5 to 46 in	XL	XL	waist 34 to 37 in, hip 43 to 45 in	US numeric 14-16

Tinted rows change label or sit between two sizes. Read from the two charts only; no formula and no averaging.

What wearers say

Charts describe a garment. People who own both brands describe a fit, and their answer ranks above this table once five of them stand behind it. Pick your size in the converter to see whether there are enough yet.

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Sources

Halara UltraSculpt size guide, read on 2026-09-18. Halara on TrueToSize
Onzie size guide, read on 2026-09-18.

Onzie to Halara